National 710663 Transfer Case Output Shaft Seal - Rear
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National 710663 Transfer Case Output Shaft Seal - Rear

Brand National 710663
Position Rear
Helix Type Bi-Directional Lip Design
Housing Bore (Inch) 2.578
Housing Bore (MM) 65.500
Inside Diameter 1.177
Inside Diameter 29.900
Material Fluoro-Elastomer
Outside Diameter 2.572
Outside Diameter 65.330
Outside Diameter (Inch) 2.587
Outside Diameter (mm) 65.700
Overall Width with Side Lip (MM) 16.000
Overall Width with Side Lip (Inch) 0.630
Part Description Oil Seal
Sealing Material Fluoro-Elastomer
Series 710600
Shaft (Inch) 1.181
Shaft (MM) 30.000
Thickness 0.433
Thickness 11.000
Type 85
Unit of Dimension Inch
Width (Inch) 0.437
Width (mm) 11.100
Fits Hummer, AM General, and Jeep · 25 vehicles

OE direct replacement. Transfer case output shaft seal installs as a direct-fit sealing solution.

Fluoro-elastomer material. Resists heat and wear for dependable sealing performance.

Bi-directional lip design. Helps maintain a tight seal as shaft rotation changes.

Cross-references Bosch 18108, National 710663 and 4798117 for the same application. See all 4.

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Not what you need? See all Transfer Case Output Shaft Seal options

Transfer Case Output Shaft Seal for Jeep and Hummer

National 710663 is a transfer case output shaft seal built for rear-position applications in select Jeep and Hummer 4WD systems. It uses a fluoro-elastomer sealing material and a bi-directional lip design to help maintain a consistent seal at the transfer case output shaft.

Key Features

  • Part number 710663 transfer case output shaft seal
  • Fluoro-elastomer material for sealing performance in drivetrain service
  • Bi-directional lip design for rotational sealing support
  • 11.000 mm width and 29.900 mm inside diameter
  • 65.330 mm outside diameter with 65.500 mm housing bore specification
  • Compatible with rear transfer case applications on Jeep Cherokee, Jeep TJ, Jeep Wrangler, Jeep Grand Cherokee, and Hummer H1

Detailed Description

National 710663 is an oil seal for transfer case output shaft service, engineered around the dimensions needed for specific New Process transfer case applications. The seal measures 1.177 inches inside diameter, 2.572 inches outside diameter, and 0.433 inches thickness, with an overall width of 0.630 inches including the side lip. National’s sealing expertise spans more than 75 years, and this seal reflects that focus with a fluoro-elastomer construction suited to drivetrain sealing demands. This part cross-references Bosch 18108 for the same application.

Fits 2006 Hummer H1, rear; Fits 2002-2004 Hummer H1, rear; Fits 1997-2001 Jeep Cherokee, rear; Fits 1997-2001 Jeep TJ, rear; Fits 1997-2001 Jeep Wrangler, rear; Fits 1997-2000 Jeep Cherokee, rear; Fits 1994 Jeep Cherokee, rear; Fits 1994 Jeep Grand Cherokee, rear.

Common Uses

  • Replacing a leaking transfer case output shaft seal
  • Addressing fluid seepage around the rear transfer case output area
  • Restoring sealing performance on New Process 231J, 242J, or 242H transfer case setups
  • Correcting driveline fluid loss that can lead to low transfer case lubricant levels
  • Servicing worn or hardened seal material in high-mileage 4WD drivetrains

Installation Notes and Tips

Verify shaft diameter, housing bore, and transfer case type before installation. This seal is specified for rear-position applications and should be matched to the exact New Process transfer case configuration listed in the fitment data. Inspect the shaft surface for grooves or wear before installing the new seal, and confirm the sealing lip is oriented correctly for the application.

Quality Assurance

National is recognized for premium sealing solutions and ongoing design support for modern vehicle applications. Part number 710663 is built to the dimensional and material requirements listed above for accurate transfer case sealing service.

This part fits 25 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelDrive TypePositionNotes
2006HummerH14WDRearFull Time 4WD; with New Process 242H Transfer Case; 2 Speed
2004HummerH14WDRearFull Time 4WD; with New Process 242H Transfer Case; 2 Speed
2003HummerH14WDRearFull Time 4WD; with New Process 242H Transfer Case; 2 Speed
2002HummerH14WDRearFull Time 4WD; with New Process 242H Transfer Case; 2 Speed
2001JeepCherokee4WDRearFull Time 4WD with New Process 242J Transfer Case and 2 Speed - Transfer Case Input Shaft Pilot Bearing
2001JeepTJ4WDRearFits New Process 231J Transfer Case with Part Time 4WD and 2 Speed.
2001JeepWrangler4WDRearFits New Process 231J Transfer Case with Part Time 4WD and 2 Speed.
2000JeepCherokee4WDRearFits New Process 231J Transfer Case with Part Time 4WD and 2 Speed.
2000JeepCherokee4WDRearFull Time 4WD with New Process 242J Transfer Case and 2 Speed - Transfer Case Input Shaft Pilot Bearing
2000JeepTJ4WDRearFits New Process 231J Transfer Case with Part Time 4WD and 2 Speed.
2000JeepWrangler4WDRearFits New Process 231J Transfer Case with Part Time 4WD and 2 Speed.
1999JeepCherokee4WDRearFits New Process 231J Transfer Case with Part Time 4WD and 2 Speed.
1999JeepCherokee4WDRearFull Time 4WD with New Process 242J Transfer Case and 2 Speed - Transfer Case Input Shaft Pilot Bearing
1999JeepTJ4WDRearFits New Process 231J Transfer Case with Part Time 4WD and 2 Speed.
1999JeepWrangler4WDRearFits New Process 231J Transfer Case with Part Time 4WD and 2 Speed.
1998JeepCherokee4WDRearFits New Process 231J Transfer Case with Part Time 4WD and 2 Speed.
1998JeepCherokee4WDRearFull Time 4WD with New Process 242J Transfer Case and 2 Speed - Transfer Case Input Shaft Pilot Bearing
1998JeepTJ4WDRearFits New Process 231J Transfer Case with Part Time 4WD and 2 Speed.
1998JeepWrangler4WDRearFits New Process 231J Transfer Case with Part Time 4WD and 2 Speed.
1997JeepCherokee4WDRearFits New Process 231J Transfer Case with Part Time 4WD and 2 Speed.
1997JeepCherokee4WDRearFull Time 4WD with New Process 242J Transfer Case and 2 Speed - Transfer Case Input Shaft Pilot Bearing
1997JeepTJ4WDRearFits New Process 231J Transfer Case with Part Time 4WD and 2 Speed.
1997JeepWrangler4WDRearFits New Process 231J Transfer Case with Part Time 4WD and 2 Speed.
1994JeepCherokee4WDRear2nd Design; Full Time 4WD; with 0.433 (in) Width; with New Process 242J Transfer Case; 2.57 (in) Outside Diameter; 2 Speed
1994JeepGrand Cherokee4WDRear2nd Design; Full Time 4WD; with 0.433 (in) Width; with New Process 242J Transfer Case; 2.57 (in) Outside Diameter; 2 Speed
Directly replaces or cross-references 4 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Bosch — 18108National — 710663479811704798117